The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1995
Filed:
Oct. 28, 1993
Motoo Goto, Ohte, JP;
Shizuo Kawakita, Ohte, JP;
Yoshiharu Mae, Ohmiya, JP;
Takuro Iwamura, Ohte, JP;
Yutaka Koshiba, Ohte, JP;
Kenji Yajima, Ohmiya, JP;
Syunji Ishibashi, Ohte, JP;
Hiroki Nagasawa, Kokubunji, JP;
Atsushi Sugahara, Kokubunji, JP;
Sumihisa Aoki, Kokubunji, JP;
Haruhiko Asao, Ohte, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Railway Technical Research Institute, Tokyo, JP;
Abstract
A wire for electric railways comprises a copper alloy which consists essentially, by weight percent, of 0.1 to 1.0% Cr, 0.01 to 0.3% Zr, and 10 ppm or less O, and if required, further contains at least one element selected from the group consisting of 0.01 to 0.1% Si and 0.001 to 0.05% Mg, with the balance being Cu and inevitable impurities. The wire is manufactured by hot working a copper alloy billet having the above composition, immediately quenching the hot worked billet to prepare an element wire, cold working the element wire at least once, and subjecting the cold worked element wire to aging treatment.